What is the difference between pass$-$by$-$address and pass$-$by$-$alias?

Group of answer choices

Pass$-$by$-$alias can modify the variable outside the function, but pass$-$by$-$address cannot.

The actual parameter in pass$-$by$-$address has to be a variable, while the actual parameter in pass$-$by$-$alias can be a variable or a constant.

Pass$-$by$-$address can modify the variable outside the function, but pass$-$by$-$alias cannot.

Pass$-$by$-$alias involves one variable only, while pass$-$by$-$address involves two variables.